Closure within a string in PHP

Question

I want to create and execute a closure within a string in PHP and it's not liking the way that I do it.

This code doesn't work...

echo ( 'Hello, ' . (function($s) { return $s; })('World!') );

Yet, this is completely valid and works as intended...

$f = (function($s) { return $s; });
echo ( 'Hello, ' . $f('World!') );

Why won't the first one work and is there a way to do it in one line (not because I think it's efficient, because I'm sure it's not)?

possible duplicate of [Self Executing functions in PHP5.3?](http://stackoverflow.com/questions/3865934/self-executing-functions-in-php5-3) — Ja͢ck, Aug 27 '12 at 20:38

score 2 · Accepted Answer · edited May 23 '17 at 12:22

2

Essentially, no self-invoking with "(...)()" until (maybe) sometime in 5.4.

edited May 23 '17 at 12:22

Community

answered Aug 27 '12 at 20:32

simshaun

@KevinHikaruEvans because the feature status is still 'under discussion' - https://wiki.php.net/rfc/fcallfcall – Ja͢ck Aug 27 '12 at 20:38
Oh alright, thanks. I guess I'll have to declare functions the old fashioned way then. – Aug 27 '12 at 20:39
Sorry for the confusion. Added the link provided from the top answer in the linked question. As Jack said, the feature is still just discussion, – simshaun Aug 27 '12 at 20:40

score 0 · Answer 2 · answered Aug 27 '12 at 20:31

0

answered Aug 27 '12 at 20:31

Ariel

2 Answers2